#include <iostream>
#include <string>
#include <vector>
#include <list>
using namespace std;

void list_test1()
{
  list<int> lt;
  lt.push_back(1);
  lt.push_back(2);
  lt.push_back(3);
  lt.push_back(4);
}

int main()
{
  list_test1();
  return 0;
}
